The authors applied functionalist theory to the question of the motivations underlying volunteerism, hypothesized 6 functions potentially served by volunteerism, and designed an instrument to assess these functions (Volunteer Functions Inventory; VFI). Exploratory and confirmatory factor analyses on diverse samples yielded factor solutions consistent with functionalist theorizing; each VFI motivation, loaded on a single factor, possessed substantial internal consistency and temporal stability and correlated only modestly with other VFI motivations (Studies 1, 2, and 3). Evidence for predictive validity is provided by a laboratory study in which VFI motivations predicted the persuasive appeal of messages better when message and motivation were matched than mismatched (Study 4), and by field studies in which the extent to which volunteers' experiences matched their motivations predicted satisfaction (Study 5) and future intentions (Study 6). Theoretical and practical implications are discussed.

The present investigation used responses to Independent Sector's 1992 national survey of giving and volunteering in the United States to address several questions about the motivations of volunteers. Drawing on the functional approach to volunteers' motivations, and its operationalization in the Volunteer Functions Inventory (VFI), relations between motivations and various aspects of volunteer behavior were examined, along with associations of motivations and demographic variables. Analyses revealed that current volunteers and nonvolunteers differed on motivations; people with different volunteering histories revealed different motivational patterns; unique combinations of motivations were associated with different types of volunteering activities; and motivational differences were associated with different demographic groups. The implications of these findings for understanding the nature and function of the motivations to volunteer, and the applications to the practice of volunteerism, are discussed.

A psychological strategy for understanding the motivational underpinnings of volunteerism is described. In a presentation that merges the theoretical interests of researchers with the practical interests of volunteer administrators, six different motivational functions served by volunteerism are identified, and an inventory designed to measure these motivations is presented. The implications of this functional approach for the recruitment, placement, and retention of volunteers are then elaborated. Finally, recommendations are provided for volunteer administrators who seek to increase the number of people who volunteer and to improve their human resource management.

Why do significant numbers of people engage in the unpaid helping activities known as volunteerism? Drawing on functional theorizing about the reasons, purposes, and motivations underlying human behavior, we have identified six personal and social functions potentially served by volunteering. In addition to developing an inventory to assess these motivational functions, our program of research has explored the role of motivation in the processes of volunteerism, especially decisions about becoming a volunteer in the first place and decisions about continuing to volunteer.

With the widespread emergence of required communityservice programs comes a new opportunity to examine the effects of requirements on future behavioral intentions. To investigate the consequences of such "mandatory volunteerism" programs, we followed students who were required to volunteer in order to graduate from college. Results demonstrated that stronger perceptions of external control eliminated an otherwise positive relation between prior volunteer experience and future intentions to volunteer. A second study experimentally compared mandates and choices to serve and included a premeasured assessment of whether students felt external control was necessary to get them to volunteer. After being required or choosing to serve, students reported their future intentions. Students who initially felt it unlikely that they would freely volunteer had significantly lower intentions after being required to serve than after being given a choice. Those who initially felt more likely to freely volunteer were relatively unaffected by a mandate to serve as compared with a choice. Theoretical and practical implications for understanding the effects of requirements and constraints on intentions and behavior are discussed.